This week's optical illusion was a little more challenging, but I think it came out just fine.
The rope is not a spiral, but rather a series of circles. You can check a box that spoils the illusion with a mask.
There's some pretty cool Excel charting going on here. All of the swaths are drawn from formulas. Have fun tearing it apart!
I'll have another next Friday...
Here's the workbook:
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